Product Description
MAHLE S42140 is an OE-quality single-cylinder standard-size piston ring set for the 2007.5–2018 6.7L Cummins ISB (Ram 2500/3500/4500/5500). Built to stock specs for reliable sealing, optimal compression, and reduced oil consumption.
- Bore: 4.2126" (≈107.4 mm)
- Configuration: Single-cylinder ring pack (order qty 6 for complete engine)
- Top ring: Ductile iron, plasma-moly face
- Second ring: Cast iron, chrome face
- Oil ring: 2-piece assembly, cast iron
- Axial heights: Top 2.87 mm, Second 2.50 mm, Oil 3.45 mm
- GTIN/UPC: 027067854667
Fitment
- 2007.5–2018 Ram 2500 / 3500 / 4500 / 5500 with 6.7L Cummins (ISB, 24-valve)
Cross Reference Numbers
- Cummins: 4955366 (ring kit, standard, equivalent/alt supplier)
- MAHLE: S42140 (STD), S42140.020 (+0.020), S42140.040 (+0.040)
- GTIN/UPC: 027067854667
FAQ
Is this a complete engine set?
No—this is a single-cylinder ring set. Order six sets for a complete engine.
Will these fit my 2007.5–2018 Ram 6.7L?
Yes—fits 6.7L Cummins ISB in Ram 2500/3500/4500/5500 (model years 2007.5–2018).
What are the materials/coatings?
Top ring is ductile iron with plasma-moly facing; second ring is cast iron with chrome facing; oil ring assembly is cast iron.
Standard or oversize?
This listing is standard bore (STD). Oversizes available separately (+0.020, +0.040).
